Frictional-resistance device.



J. J. JONES.

PRIOTIONAL RESISTANCE DEVICE.

APPLICATION FILED DEC. 9, 1908.

191mm? I Patented Feb. 23,1915.

WITNESSES JOSI-I UA J. JONEEi, OF PITTSBURGH, PENNSYLVANIA, ASSXGNOR, BY MESN'E ASSIGN- MENTS, T0 UNION DRAFT GEAR COMPANY, A CORPGRATION OF ILLINOIS.

FRICTIQNAL-RESISTANCE DEVICE.

treason Specification of Letters E'atcnt.

Application filed December 5;, Serial No. $66,605..

To all whom it may concern:

Be it known that I, Josnoe J. Jones, a citizen of the United States, residing at Pittsburgh, in the county of Allegheny and. State of Pennsylvania, have invented new and useful Improvements in Frictional-Resistance Devices, of which the following is a specification.

This invention relates to frictional resistance devices, and more particularly to friction draw-gear and buliing apparatus for railway service.

One object of myinvention is to provide an improved construction of the above charactor of compact design and adapted to be cheaply manufactured.

Another object of my improvements is to provide a friction draw-gear and buliingapparatus having a plurality of frictional resistance devices adapted to act successively in taking up draft and bufling strains.

In the accompanying drawing; Figure l is a side elevation, partly in section, of a friction draft rigging for a railway car, embodying; my improvements; Fig. 2 a top plan view of same, With one of the friction blocks removed; Fig. 3 a'transverse section thereof taken on the line ca of Fig. 1.; and Fig. 4: a perspective View of one of the friction blocks. a

According to a preferred construction, as illustrated in the drawing, I provide a draw bar 1 having a series of oppositely arranged notches 2, the inclined faces of which are adapted to coact with corresponding faces of friction blocks Each pair of friction blocks 3 is adapted to move laterally against the resistance of a coil spring lWl'llCll may be held in engagement with one friction block by means of a bolt 5 passing through the opposite hloclrs of a pair, as shown in the drawing, or by means of a strap passing around the outside of the blocks, as shown in my prior Patent No. 618 M? of January 31,

1899 The draw bar 1 is provided with slots 6 of suflicient extent to permit of a certain ion tudinal movement of the bolts 5 therein.

l have shown a series of three sets of friction mechanisms, in which the outer friction mechanisms are arranged to normally bear against fixed abutments 7 suitably secured to the center sills 9 of the car. The draw loar l is supported on a friction plate 8 fastened to the under portion of the center sills 9.

In: operat on, pull on the draw bar 1 causes its longitudinal movement to the left and consequently the friction blocks 3 at the extreme Patented Feta, 233, 319155,

left ride'up on an opposite pair of inclined faces of thenotch 2, against toe resistance of spring Frictional resistance to the movement of the draw bar is thus produced and in addition the lateral movement of the fric tion blocks causes frictional engagement be tween the abutment 7 and the vertical faces of the blocks. The longit "nal. movement of the Lil W bar c Jli'l the second or intermediate pair e on blocks are carried by the draw bar into ens first pair of friction bio and. thereupon the first of blocks act an abutment for the intermediate set and cause this set to ride up the cori spending inclined surfaces. By this means the frictional resistances due to the intermediate friction mechanism is added to that of the lirst and the resistance to longitudinal movement of the draw bar is correspondingly increased. .lnlilre man:-

' nor, the friction mechanism at the extreme device has been provided whereby a grad ually increased resistance {is interposed to the movement of the draw her, according to the force of pulling or boiling impact to be transmitted and absorbed.

Having now described my invention, What I claim as new and desire to secure by Letters Patent, is

1.. In a friction draw-gear and buiiing apparatus, the combination with a draw-bar, of a plurality of yielding resistance mechanisms mounted on the drawbar and spaced apart each comprising opposing laterally movable friction blocks, a coacting Wedge on the draW-loar and a spring for resisting the lateral movement of the blocks and stops for successively limiting" the longitudinal movement of said mechanisms to cause the successive serial action of said yielding resistance with the till fllil mechanisms upon longitudinal movement of the draw-bar.

2. In a friction draw-gear and buffing apparatus, the combination with a draw-bar, of a plurality of yielding resistance mechanisms carried by the draw-bar and adapted to successively oppose longitudinal movement of the draw-bar and comprising opposing laterally movable blocks having inclined friction faces, a longitudinally movable Wedge on the draw-bar having correspondingly inclined friction faces, and a spring for resisting lateral movement of the blocks, said blocks also being provided with friction faces transverse to the line of draft and adapted to coact with corresponding friction faces upon lateral movement thereof.

3. The combination with a draw-bar provided with a series of oppositely arranged notches, of laterally movable friction blocks carried in said notches and adapted to have a longitudinal movement with the draw-bar and springs longitudinally movable with said friction blocks for resisting the lateral movement of said blocks.

4. In a friction draw-gear and buffing apparatus, the combination With a draw-bar provided With pairs of oppositely arranged inclined friction faces, of friction blocks having friction faces adapted to coact With said inclined friction faces, a spring for resisting lateral movement of each pair of opposite friction blocks, and means for causing the successive action of the several pairs of blocks.

5. In a friction draw-gear and bulling apparatus, the rombination with a draw-bar provided with pairs of oppositely arranged notches, of laterally movable frictionbloclis adapted to be carried in said notches, springs determined longitudinal movement of the draw-bar.

In testimony whereof I have hereunto set my hand.

JOSHUA J JONES.

Witnesses:

B. Rurneuroonn, H. G. RICHMOND. 

